Aplin, L. M.; Sheldon, B. C.; McElreath, R.: Conformity does not perpetuate suboptimal traditions in a wild population of songbirds. Proceedings of the National Academy of Sciences of the United States of America 114 (30), pp. 7830 - 7837 (2017)
Scientists studying a rare population of tool-using chimpanzees have found that aging can have a profound impact on their abilities—but not all chimps decline equally.